Definition: You are given a question on anatomy. Anatomy is the science that studies the structure of the body. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The spheno-occipital synchondrosis
(A)is a secondary growth cartilage. (B)influences the position of the viscerocranium. (C)ceases activity at 7 years of age. (D)can be reactivated in patients affected by acromegaly.

B